charlock Meaning, Definition & Usage

  1. noun weedy Eurasian plant often a pest in grain fields
    wild mustard; field mustard; chadlock; Brassica kaber; Sinapis arvensis.

WordNet

Char"lock noun
Etymology
AS. cerlic; the latter part perh. fr. AS. leác leek. Cf. Hemlock.
Definitions
  1. (Bot.) A cruciferous plant (Brassica sinapistrum) with yellow flowers; wild mustard. It is troublesome in grain fields. Called also chardock, chardlock, chedlock, and kedlock.

Webster 1913